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Can a shadow be generated from a uiview?


Asked by Virginia Wolf on Dec 13, 2021 FAQ



Please try again later. iOS can dynamically generate shadows for any UIView, and these shadows automatically adjust to fit the shape of the item in question – even following the curves of text inside a UILabel. This functionality is built right in, so all you need to do is configure its properties, and there are four you need to care about:
Likewise,
All subclasses of UIView, plus UIView itself, have access to a layer property where we can apply shadow effects directly in code. There are lots of parameters we can tweak: shadowColor controls the color of the shadow, and can be used to make shadows (dark colors) or glows (light colors).
Moreover, To add a shadow to our new view, we need to add the following lines of code to our newView () method just below the view.backgroundColor = .blue: view. layer. shadowOffset = CGSize( width: 10, height: 10) view. layer. shadowRadius = 5 view. layer. shadowOpacity = 0.3
Thereof,
Be warned: generating shadows dynamically is expensive, because iOS has to draw the shadow around the exact shape of your view's contents. If you can, set the shadowPath property to a specific value so that iOS doesn't need to calculate transparency dynamically. For example, this creates a shadow path equivalent to the frame of the view:
Next,
shadowOffset controls how far the shadow is moved away from its view. This defaults to 3 points up from the view. shadowOpacity controls how transparent the shadow is. This defaults to 0, meaning “invisible”.